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Technical & Reference Section => Tech and Restoration => Topic started by: TwoBobRob on February 10, 2008, 11:25 PM

Title: Profile chainring bolt size
Post by: TwoBobRob on February 10, 2008, 11:25 PM

.... can anyone tell me specifically what size the bolt is?   I know its a 7/16" buttonhead bolt, but is it coarse or fine thread - can anyone tell me for certain?

Or is it some wierdo cycle spec thread?

Cheers

Rob

Title: Re: Profile chainring bolt size
Post by: MartyC on February 10, 2008, 11:26 PM

Rob, given it's US made and will be an Imperial size it's probably coarse thread  :daumenhoch:

Title: Re: Profile chainring bolt size
Post by: TwoBobRob on February 10, 2008, 11:30 PM

It does look like it is coarse.  Just wanted to see if anyone knew for deffo as I need to buy a longer version, so it's not going to come from a bike shop...

Title: Re: Profile chainring bolt size
Post by: BigassBMX on February 11, 2008, 07:50 AM

ite rob.

how long do u need it man coz i think i mite have 1 here.

Title: Re: Profile chainring bolt size
Post by: TwoBobRob on February 11, 2008, 09:16 PM

I need it to be double the length of a regular one, so about 1"  (25mm).  I've had to space the crank arm out a mile on my shiity cruiser.......  :(

Title: Re: Profile chainring bolt size
Post by: lazychubs on February 11, 2008, 10:58 PM

rob i also have one but cant measure at the mo as need to find tape measure lol